Sum of Digits Java Program

admin

6 years ago

Table of Contents

Introduction

In this post, we will write a java program to calculate the sum of digits of a number. We will take input from the user with a prompt to enter the number.

Eclipse IDE Setup

Some steps and instructions to create a Java application on Eclipse IDE:

Create Java Project in Eclipse

https://www.testingdocs.com/create-a-new-java-project-in-eclipse/

Create Java Package in Eclipse

https://www.testingdocs.com/create-java-package-in-eclipse-ide/

Create Java Class in Eclipse

https://www.testingdocs.com/create-a-new-java-class-in-a-project/

Run Java Project in Eclipse

https://www.testingdocs.com/run-java-project-in-eclipse/

Java Program

import java.util.Scanner;
/**************************************************
 * DigitSum.java
 * @program   	: DigitSum to calculate the sum of 
 *                digits in the number.
 * @web        	: www.TestingDocs.com
 * @version     : 1.0
 **************************************************/
public class DigitSum {
  private int number;
  private int sum;

  /**
   * @return the number
   */
  public int getNumber() {
    return number;
  }

  /**
   * @param number the number to set
   */
  public void setNumber(int number) {
    this.number = number;
  }

  /**
   * @return the sum
   */
  public int getSum() {
    return sum;
  }

  /**
   * @param sum the sum to set
   */
  public void setSum(int sum) {
    this.sum = sum;
  }

  /**
   * @param number
   * @param sum
   */
  public DigitSum(int number) {
    this.number=number;
    this.sum = 0;
  }

  private void calculateSum() {
    int remainder = number;
    int digit = 0;
    while(remainder > 0) {
      digit= remainder%10;
      remainder= remainder/10;
      
      this.sum= this.sum + digit;
    }
  }

  public static void main(String args[]) {
    int number=0;
    Scanner keyboard = new Scanner(System.in);
    System.out.println("Enter number :=");
    number = keyboard.nextInt();

    DigitSum ds= new DigitSum(number);
    ds.calculateSum();
    System.out.println("Sum of Digits := " + ds.getSum());
  }
}

Program Output

Enter number :=
1687
Sum of Digits := 22

Screenshot

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Java Tutorials

Java Tutorial on this website:

https://www.testingdocs.com/java-tutorial/

For more information on Java, visit the official website :

https://www.oracle.com/in/java/